On Thu, Apr 29, 2021 at 12:28 PM Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx> wrote: > > drm_dev_register() sets connector->registration_state to > DRM_CONNECTOR_REGISTERED and dev->registered to true. If > drm_connector_set_panel_orientation() is first called after > drm_dev_register(), it will fail several checks and results in following > warning. > > Add a function to create panel orientation property and set default value > to UNKNOWN, so drivers can call this function to init the property earlier > , and let the panel set the real value later. > > [ 4.480976] ------------[ cut here ]------------ > [ 4.485603] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xb4/0xbc > <snip> > [ 4.609772] Call trace: > [ 4.612208] __drm_mode_object_add+0xb4/0xbc > [ 4.616466] drm_mode_object_add+0x20/0x2c > [ 4.620552] drm_property_create+0xdc/0x174 > [ 4.624723] drm_property_create_enum+0x34/0x98 > [ 4.629241] drm_connector_set_panel_orientation+0x64/0xa0 > [ 4.634716] boe_panel_get_modes+0x88/0xd8 > [ 4.638802] drm_panel_get_modes+0x2c/0x48 > [ 4.642887] panel_bridge_get_modes+0x1c/0x28 > [ 4.647233] drm_bridge_connector_get_modes+0xa0/0xd4 > [ 4.652273] drm_helper_probe_single_connector_modes+0x218/0x700 > [ 4.658266] drm_mode_getconnector+0x1b4/0x45c > [ 4.662699] drm_ioctl_kernel+0xac/0x128 > [ 4.666611] drm_ioctl+0x268/0x410 > [ 4.670002] drm_compat_ioctl+0xdc/0xf0 > [ 4.673829] __arm64_compat_sys_ioctl+0xc8/0x100 > [ 4.678436] el0_svc_common+0xf4/0x1c0 > [ 4.682174] do_el0_svc_compat+0x28/0x3c > [ 4.686088] el0_svc_compat+0x10/0x1c > [ 4.689738] el0_sync_compat_handler+0xa8/0xcc > [ 4.694171] el0_sync_compat+0x178/0x180 > [ 4.698082] ---[ end trace b4f2db9d9c88610b ]--- > [ 4.702721] ------------[ cut here ]------------ > [ 4.707329] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:243 drm_object_attach_property+0x48/0xb8 > <snip> > [ 4.833830] Call trace: > [ 4.836266] drm_object_attach_property+0x48/0xb8 > [ 4.840958] drm_connector_set_panel_orientation+0x84/0xa0 > [ 4.846432] boe_panel_get_modes+0x88/0xd8 > [ 4.850516] drm_panel_get_modes+0x2c/0x48 > [ 4.854600] panel_bridge_get_modes+0x1c/0x28 > [ 4.858946] drm_bridge_connector_get_modes+0xa0/0xd4 > [ 4.863984] drm_helper_probe_single_connector_modes+0x218/0x700 > [ 4.869978] drm_mode_getconnector+0x1b4/0x45c > [ 4.874410] drm_ioctl_kernel+0xac/0x128 > [ 4.878320] drm_ioctl+0x268/0x410 > [ 4.881711] drm_compat_ioctl+0xdc/0xf0 > [ 4.885536] __arm64_compat_sys_ioctl+0xc8/0x100 > [ 4.890142] el0_svc_common+0xf4/0x1c0 > [ 4.893879] do_el0_svc_compat+0x28/0x3c > [ 4.897791] el0_svc_compat+0x10/0x1c > [ 4.901441] el0_sync_compat_handler+0xa8/0xcc > [ 4.905873] el0_sync_compat+0x178/0x180 > [ 4.909783] ---[ end trace b4f2db9d9c88610c ]--- > > Signed-off-by: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx> Hi maintainers, Can you help review with this patch? Thanks > --- > v6, v5: > don't create property in set_panel_orientation. > > v4, v3: > create property in dsi driver and set value in panel. > > v2: > create property in connector init > https://patchwork.kernel.org/project/linux-mediatek/patch/20210426051848.2600890-1-hsinyi@xxxxxxxxxxxx/ > > v1: > set panel orientation in dsi driver > https://patchwork.kernel.org/project/linux-mediatek/patch/20210409045314.3420733-1-hsinyi@xxxxxxxxxxxx/ > --- > drivers/gpu/drm/drm_connector.c | 58 ++++++++++++++++++------- > drivers/gpu/drm/i915/display/icl_dsi.c | 1 + > drivers/gpu/drm/i915/display/intel_dp.c | 1 + > drivers/gpu/drm/i915/display/vlv_dsi.c | 1 + > include/drm/drm_connector.h | 2 + > 5 files changed, 47 insertions(+), 16 deletions(-) > > diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c > index 7631f76e7f34..7189baaabf41 100644 > --- a/drivers/gpu/drm/drm_connector.c > +++ b/drivers/gpu/drm/drm_connector.c > @@ -1210,7 +1210,7 @@ static const struct drm_prop_enum_list dp_colorspaces[] = { > * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel > * coordinates, so if userspace rotates the picture to adjust for > * the orientation it must also apply the same transformation to the > - * touchscreen input coordinates. This property is initialized by calling > + * touchscreen input coordinates. This property value is set by calling > * drm_connector_set_panel_orientation() or > * drm_connector_set_panel_orientation_with_quirk() > * > @@ -2173,8 +2173,8 @@ EXPORT_SYMBOL(drm_connector_set_vrr_capable_property); > * @connector: connector for which to set the panel-orientation property. > * @panel_orientation: drm_panel_orientation value to set > * > - * This function sets the connector's panel_orientation and attaches > - * a "panel orientation" property to the connector. > + * This function sets the connector's panel_orientation value. If the property > + * doesn't exist, it will return an error. > * > * Calling this function on a connector where the panel_orientation has > * already been set is a no-op (e.g. the orientation has been overridden with > @@ -2205,19 +2205,11 @@ int drm_connector_set_panel_orientation( > info->panel_orientation = panel_orientation; > > prop = dev->mode_config.panel_orientation_property; > - if (!prop) { > - prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, > - "panel orientation", > - drm_panel_orientation_enum_list, > - ARRAY_SIZE(drm_panel_orientation_enum_list)); > - if (!prop) > - return -ENOMEM; > - > - dev->mode_config.panel_orientation_property = prop; > - } > + if (WARN_ON(!prop)) > + return -EINVAL; > > - drm_object_attach_property(&connector->base, prop, > - info->panel_orientation); > + drm_object_property_set_value(&connector->base, prop, > + info->panel_orientation); > return 0; > } > EXPORT_SYMBOL(drm_connector_set_panel_orientation); > @@ -2225,7 +2217,7 @@ EXPORT_SYMBOL(drm_connector_set_panel_orientation); > /** > * drm_connector_set_panel_orientation_with_quirk - > * set the connector's panel_orientation after checking for quirks > - * @connector: connector for which to init the panel-orientation property. > + * @connector: connector for which to set the panel-orientation property. > * @panel_orientation: drm_panel_orientation value to set > * @width: width in pixels of the panel, used for panel quirk detection > * @height: height in pixels of the panel, used for panel quirk detection > @@ -2252,6 +2244,40 @@ int drm_connector_set_panel_orientation_with_quirk( > } > EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk); > > +/** > + * drm_connector_init_panel_orientation_property - > + * create the connector's panel orientation property > + * > + * This function attaches a "panel orientation" property to the connector > + * and initializes its value to DRM_MODE_PANEL_ORIENTATION_UNKNOWN. > + * > + * The value of the property can be set by drm_connector_set_panel_orientation() > + * or drm_connector_set_panel_orientation_with_quirk() later. > + * > + * Returns: > + * Zero on success, negative errno on failure. > + */ > +int drm_connector_init_panel_orientation_property( > + struct drm_connector *connector) > +{ > + struct drm_device *dev = connector->dev; > + struct drm_property *prop; > + > + prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, > + "panel orientation", > + drm_panel_orientation_enum_list, > + ARRAY_SIZE(drm_panel_orientation_enum_list)); > + if (!prop) > + return -ENOMEM; > + > + dev->mode_config.panel_orientation_property = prop; > + drm_object_attach_property(&connector->base, prop, > + DRM_MODE_PANEL_ORIENTATION_UNKNOWN); > + > + return 0; > +} > +EXPORT_SYMBOL(drm_connector_init_panel_orientation_property); > + > int drm_connector_set_obj_prop(struct drm_mode_object *obj, > struct drm_property *property, > uint64_t value) > diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c > index 9282978060b0..5ac4538e4283 100644 > --- a/drivers/gpu/drm/i915/display/icl_dsi.c > +++ b/drivers/gpu/drm/i915/display/icl_dsi.c > @@ -1903,6 +1903,7 @@ static void icl_dsi_add_properties(struct intel_connector *connector) > > connector->base.state->scaling_mode = DRM_MODE_SCALE_ASPECT; > > + drm_connector_init_panel_orientation_property(&connector->base); > drm_connector_set_panel_orientation_with_quirk(&connector->base, > intel_dsi_get_panel_orientation(connector), > connector->panel.fixed_mode->hdisplay, > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c > index a5231ac3443a..f1d664e5abb2 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -5263,6 +5263,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp, > intel_panel_setup_backlight(connector, pipe); > > if (fixed_mode) { > + drm_connector_init_panel_orientation_property(connector); > drm_connector_set_panel_orientation_with_quirk(connector, > dev_priv->vbt.orientation, > fixed_mode->hdisplay, fixed_mode->vdisplay); > diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c > index 9bee99fe5495..853855482af1 100644 > --- a/drivers/gpu/drm/i915/display/vlv_dsi.c > +++ b/drivers/gpu/drm/i915/display/vlv_dsi.c > @@ -1632,6 +1632,7 @@ static void vlv_dsi_add_properties(struct intel_connector *connector) > > connector->base.state->scaling_mode = DRM_MODE_SCALE_ASPECT; > > + drm_connector_init_panel_orientation_property(&connector->base); > drm_connector_set_panel_orientation_with_quirk( > &connector->base, > intel_dsi_get_panel_orientation(connector), > diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h > index 1922b278ffad..4396c1c4a5db 100644 > --- a/include/drm/drm_connector.h > +++ b/include/drm/drm_connector.h > @@ -1696,6 +1696,8 @@ int drm_connector_set_panel_orientation_with_quirk( > struct drm_connector *connector, > enum drm_panel_orientation panel_orientation, > int width, int height); > +int drm_connector_init_panel_orientation_property( > + struct drm_connector *connector); > int drm_connector_attach_max_bpc_property(struct drm_connector *connector, > int min, int max); > > -- > 2.31.1.498.g6c1eba8ee3d-goog >
